Mechanical Engineering Answers

Air of mass 2 kg is compressed reversibly and adiabatically from an initial state at 1.2 kPa, 28°C
to 2 MPa and then expanded at a constant pressure to the original volume.
(i) Sketch the process on the p-V plane;
(ii) Determine the heat and work transfer.
Take for air, assume R = 0.287 kJ/kgK and Cv = 0.713 kJ/kgK

The properties of a closed system change following the relation between pressure and volume as pV= 3.0, where P is in bar V is in m^3. Calculate the work done when the pressure increases from 1.5 bar to 7.5 bar.

Develop the lateral surface area of right circular cylinder of base diameter 60 mm and height of axis 85 mm.

Draw the isometric view of a right circular cone of base diameter 50 mm and height of axis 80 mm.

Draw the isometric view of a right regular hexagonal pyramid of base side 35 mm and height of axis 70 mm.

what is the final pressure of an ideal gas at 50 psig and 90 F, heated in a closed container to 150 F?expres your answer in psia

In a simple jib crane, the vertical post is 2.4m high, the jib is 3.9m long and the tie is long. Find the forces on the jib and tie rod when a weight of 2.5kN is supported at the crane end.

Determine the density of steam at a pressure of 5.5 bar and dryness fraction 0.85

100kg car mass, constant springs at 17.5 kN/m. This piece of crap with a magnetic hanger, was dropped into the dump. Once it hits the ground, it oscillates. Calculate frequency vibrations

A conical diffusing section diverges uniformly from 0.1 m diameter to 0.2 m diameter
over a length of 1 metre. Find the local and convective acceleration at the middle of
the diffuser. Consider the following two cases:
(i) rate of flow is 100 litres/sec at it remains constant,
(ii) rate of flow varies uniformly from 100 lit/sec to 200 litre/sec in 5 sec. and time of
interest is when t = 2 sec.
Velocity at any cross section, perpendicular to the flow direction, may be assumed to be
uniform.